feat: add eslint & eslint-plugin-compat (#54)

## Description of the change
This PR adds eslint configuration for fixing browser compatibility
errors.

However this doesn't detect array methods such as `toSorted` #53
amilajack/eslint-plugin-compat#258 (comment).
I've also tried to add
https://github.com/azu/eslint-plugin-typescript-compat for detecting the
methods. But no luck. 😩

- Add eslint config for the project
- Add `eslint-plugin-compat` for browser compatibilities
- Add to `package.json`
```
 "browserslist": [
    "chrome 64",
    "edge 79",
    "firefox 67",
    "opera 51",
    "safari 12"
  ]
```
I've disabled the recommended rules as there quite a lot of error and we
can tackle them in another PR.
<img width="461" alt="Screenshot 2024-02-28 at 17 09 56"
src="https://github.com/saasquatch/bunshi/assets/17547035/9be59f4c-f58b-4552-a868-532f579d3466">

---------

Co-authored-by: Logan Volkers <[email protected]>

.eslintrc.json

@@ -0,0 +1,21 @@
+{
+  "env": {
+    "browser": true
+  },
+  "extends": [
+    "plugin:compat/recommended"
+    // "eslint:recommended",
+    // "plugin:@typescript-eslint/recommended"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "plugins": ["compat", "@typescript-eslint"],
+  "rules": {
+    "compat/compat": "error"
+  },
+  "ignorePatterns": ["examples/**", "dist/**", "node_modules/**", "website/**"],
+  "settings": { "lintAllEsApis": true }
+}